For Steel Pickling

Recycling Acid Using the World Standard APU®

The most widely used acid recycling system in the world, the Eco-Tec Acid Purification Unit, APU®,eliminates bath dumping by removing metals as they dissolve into the stainless steel pickling acid. Since 30% – 70% of original acid is lost in bath dumping before being used, the APU® dramatically reduces acid and related waste treatment expenses.

With consistent bath chemistry, stainless steel pickling performance is assured. With metals at low levels, further improvements are realized in cooler running temperatures and reduced generation of sludge and fumes. The APU® uses a resin sorption process and simple water wash to recover acid. The net result is a virtually continuous process for acid purification.

The Eco-Tec MicroPur™ is a version of the APU® designed in a range of sizes to accommodate the small to mid-sized pickler.

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Eco-Tec designs, develops, and manufactures equipment for industrial water treatment and purification of chemicals and gases. Our products incorporate advanced, proprietary designs which improve performance, economy, and reliability in their operations, while facilitating environmental responsibility. In business since 1970, we have supplied over 2,000 systems in 60 countries.